<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

</head>
<body>

<form action="" method="post" enctype="multipart/form-data">

    <p>
        上传文件：<input type="file" name="f1" multiple >
    </p>
    <button>上传</button>

</form>


</body>
</html>